package com.geely.design.principle.singleresponsibility;

/**
 * @Author CandyDingDing
 * @Version 1.0
 * @Motto 且视他人之疑目如盏盏鬼火,大胆地去走吾之夜路
 * @Describe 
 * @Date 2022/4/8
 */
public interface ICourse {
    String getCourseName();
    byte[] getCourseVideo();

    void studyCourse();
    void refundCourse();

}
